In 1952, friends combined their passions for model airplanes to develop a thriving business dedicated to providing high quality products to enthusiasts around the world. More than 50 years later, Midwest s product line and distribution have grown and changed, but its passion for quality has remained steadfast. Today, Midwest Products is a leading supplier worldwide of quality raw materials, accessories and kits to distributors and retailers. People use our products for leisure, educational and professional pursuits, from model airplanes and boats to architectural and educational projects. We are proud that our products enrich the lives of literally hundreds of thousands of people around the world everyday. Midwest s "O" Scale Cork Roadbed resembles the ballast used on real railroads. Its beveled edged enhance this realism. It has consistent thickness, is lightweight, cuts and shapes easily and offers excellent sound absorption. 25 pair per box. 3/16 (5mm) x 2-5/8 x 36.